Apparatus for lasting shoes



y 1947- J. s. KAMBORIAN 2,424,240

APPARATUS FOR LSTING SHOE S Filed March 21, 1944 5 Sheets-Sheet 1eiacajlmazz'aza y 1947- J. s. KAMBORIAN APPARATUSHFOR LAs'rIN'G SHOESFiled March 21, 1944 5 Sheets-Sheet 2 rzafeizfor July 22, 1947. J. s.KA-MBQRIAN I 7 2,424,240

APPARATUS FOR LAS'IING SHOES Filed March 21, 1944 5 Sheets-Sheet. 3

f'aa'azzlar' we fzea iiimar m y 1947' v J. 5. KAMBORIAN 2,424,240

APPARATUS FOR LASTING SHOES Filed March 21, 1944 5 Sheets-Sheet 4Patented July 22, 1947 UNITED STATES PATENT OFFICE This inventionpertains to machines for stretchin flexible sheet material and unitingit to other parts, the specific embodiment herein 11 Claims. 7 (Cl.12-2) illustrated by way of example being a machine for lasting shoes,the present invention constituting an improvement over that disclosed inthe patent to Kamborian 2,251,285 dated August 5, 1941.

The principal'object of the invention is to provide simple and reliablemeans for stretching flexible material and for forming and insertingfasteners for uniting the stretched material to another part, forinstance, for updrawing and inwiping the upper of a shoe about a lastand for forming staples from wire and inserting them through the marginof the upper material and into a sole member, for instance an insole. Afurther object is to provide a lasting machine capable of lasting shoes(including those having deep shanks) of the McKay, metallic fastenertype, not only at the shank and forepart portion but also at both endportions of the shoe and with great rapidity and with highlysatisfactory results, but without requiring great skill on the part ofthe operator. Other and further objects and advantages of the inventionwill be pointed out in the following more detailed description and byreference to the accompanying drawings wherein Fig. 1 is a fragmentaryelevation showing the left-hand side of a lasting machine embodyin theinvention;

Fig. 2 is a fragmentary front elevation of the machine shown in Fig. 1;

Fig. 3 is a fragmentary front elevation (partially rotated from normalposition and to larger scale), With certain parts removed, showingdetails of the staple-forming and drivin means;

Fig. 4 is a section substantially on the line l4 of Fig. 3;

Fig. 5 is a fragmentary front elevation similar to Fig. 3 but showingthe parts in another position;

Fig. 6 is a section substantially on the line 66 of Fig. 4 but omittingthe staple driver;

Fig. 7 is a section substantially on the line 'I-'l of Fig. 4;

Fig. 8 is a section substantially on the line 88 of Fig. 3 but to largerscale;

Fig. 9 is a fragmentary front elevation showing the parts in theposition illustrated in Fig. 8;

Fig. 10 is a fragmentary vertical section in the same plane as Fig. 4but showing the parts in another position;

Fig. 11 is a fragmentary front elevation similar to Fig. 9, but showingthe staple as having been formed;

Fig. 12 is an elevation similar to Fig. 1 1 showing the formed staplebeing driven past the anvil.

Fig. 13 is a section on the line I 3-I3 of Fig. 11;

Fig. 14 is a fragmentary elevation, with the shoe in vertical section,in the plane of theaxes of the lasting rolls, illustrative of theoperation of lasting a shoe by means of the present apparatus; and

Fig. 15 is a section substantially on the line I5-I 5 of Fig. 14.

Referring to the drawings the numeral I designates a rigid hollow base,for example of the general type of that shown in the patent to Kamborianabove referred to. This base may be a casting or may be built fromassembled plates or the like and is provided with a top member l whichforms a support for the frame 3 which carries most of the operatingmechanism. This frame 3 is preferably a casting and is of rigid andstrong material. As illustrated in Fig. 1, this frame comprises aportion 3 which projects forwardly and overhangs the front vertical faceI of the base I so as to provide ample space for the manipulation of theshoe durin the lasting operation Without contact of the shoe with thebase. The frame 3 is provided with suitable bearings for a main shaft 4which is provided at its rear end with a pulley 5 which receives a belt6 which embraces a pulley I of smaller diameter on the shaft 8 of amotor 9 which is mounted on the top member I of the base. A clutchdevice (not shown) is preferably interposed between the shaft 4 and thepulley 5, the clutch being controlled in conventional manner by meansof. a treadle (not shown) accessible to the operator at the front of themachine.

As illustrated in the aforesaid patent to Kamborian, the mechanismherein described comprises a slide member II'I of the same type andguided in substantially the same way as the similarly designated slidemember of the aforesaid Kamborian patent. The present machine like thatof the patent is provided with a pair of oppositely turning lastingrolls H3 and H4, here shown as provided with helical ribs of oppositepitch, the roll H3 being carried by a vertical shaft (not shown) which imounted in bearings in the main frame, while the roll H4 is mounted on aparallel shaft II5 having bearings in the slide member I Il The mainshaft 4 is provided with an elongated worm (not shown) which at alltimes meshes with gears for driving the shafts of the rolls H3 and II 4.The slide II I is urged rearwardly by spring (not shown) and may bemoved forwardly to separate the rolls I I3 and I I4 by suitableconnections including a further actuated treadle (not shown). Referencemay be had to the aforesaid patent for details not herein specificallyillustrated.

A work-guiding roll I I, of substantially disk shape and havin asubstantially fiat upper face and a rounded peripheral work-engagingedge or rim I0, is mounted to turn freely on a vertical spindle carriedby a rigid arm I2 projecting forwardly from a bracket I3 secured to thefront face of the base. Whereas in the aparatus disclosed in theaforesaid Kamborian patent the marginal material of the upper isstressed inwardly over the insole by a reciprocating wiper device, inthe present apparatus a vertically thin stationary wiper blade I4 (Fig.15) is provided,

this wiper having a smoothly rounded outer edge for engagement with theupper material. This blade closely underlies the lower end of the roll II3 and is interposed between the plane of the lower end of the roll H3and the upper surface of the guide roll II. This wiper is supported byor formed integrally with a. bracket I5 fixedly secured to the base I.

At its left-hand side the frame 3 is provided with bearing members Itand H for a shaft l8. This shaft I8 is inclined upwardly and forwardlyand is driven from the shaft 4 by a belt I20 and pulleys H9 and |2I. Theframe also includes the aligned elongate inclined rigid guide members I9and I 9 which support the staple-forming and driving means, the parts I9and I9 being inclined (Fig. 2) to the vertical plane of the drivingshaft 4 at an angle of approximately and to the vertical forward face lof the base (Fig. 1) at an angle of approximately 10.

The part I9 (Fig. 8) is provided at its forward face with an elongateguide slot 29 designed to receive a slide member 22 (Fig. 12) whoselower end is shaped to take part in cutting and forming the staple. Theforward surface of the slide 22 is substantially flush with the forwardsurface of the guide member I9 and is held in place in. the slot bymeans of removable cover-plates 2| and 2|- (Figs. 4 and 10) which aresecured to the member |9 by screws or bolts. At its left-hand side theslide 22 is provided with a projecting ear 23 (Fig. 3) which extendsthrough an elongate slot 23 in the member I9 and which is connected by apivot pin 24 to the lower end of an eccentric rod 25, a spacer sleeve 24(Fig. 4) preferably being interposed between the ear 23 and the lowerend of the rod 25. The eccentric rod is connected to the eccentric strap26 which embraces an cecentric 21 on the forward end of the shaft I8.Thus as the shaft I3 rotates the slide 22 is moved up and down in theslot 20.

and slide 28 (Figs. 3 and 4) which is held within the slot by the coverplate 2| and which has, at its upper end, an upwardly extending rod orpost 29 (Figs. 1 and 2) which slides freely in a guide opening in a boss30 integral with the frame member I9. A coil spring 3| bears at itsupper end against the under surface of the boss 39 and at its lower endagainst a collar 32 fixed to the rod 29, the spring embracing the rodand tending constantly to force the rod and the slide 28 downwardly.Near its upper end the rod 29 carries a resilient Washer 32 which bearsagainst an adjustable adjustment nut 33 having threaded engagement wtihthe upper end of the rod. This resilient washer 32 cushions the shock ofdownward movement of the slide 28 when the latter is projecteddownwardly by the sprin 3|. The slide 28 is provided with a roller 34(Figs. 1 and 2) which engages the edge of a cam 35 mounted on the shaftI8 just to the rear of the eccentric 21. This cam having a substantiallyradial edge 36 (Fig. 3) at the end of its riser portion 36 so that whenthe roll 34 reaches the end of the riser .36 it is free to drop radiallyalong the surface .50 In the upper part of the slot 20 there is a sec-36 and thus permit a very sudden downward movement of the slide 28 byspring 3 I.

The slide 22 is provided with a slot 31 (Fig. 6), cruciform intransverse section, having the oppositely directed transverse arms 38each of a size to receive one leg of the staple which is formed and toconfine such leg with a close sliding fit. Within this slot 31 there isarranged a driver slide 39 (Fig. 7) which has lateral fins 40 whichslide in the transverse arms 38. The lower end of this driver slide 39constitutes the stapleadvancing and driving element. At its upper end(Fig. 3) this slide 39 is provided with an elongate head 39 having aslot 4| which receives screws 42 whereby the head 39 is adjustablysecured to the slide 28.

The lower end (Fig. 4) of the guide slot 29 in the part I9 is defined bya substantially horizontal shelf 29 which constitutes the top surface ofa downward extension I9 of the frame member I9. Removable guide members42 and 43 (Fig. 3) are secured to opposite sides respectively of theextension I9 by means of screws or bolts, the parts 42 and 43 havingvertical guide slot 44 and 44 in their opposed surfaces respectivelywhich form in effect continuations of the arm 38 of slot 31 in the slide22. The parts 42 and 43 terminate in smoothly rounded ends 45 and 46respectively, designed to engage the marginal material of the upper asthelatter is forced inwardly over the edge of the insole by the wiper.As illustrated in Fig. 3, the parts 42 and 43 are of different lengthsso that the ends 45 and 46 may both contact the margin of the upper withsubstantially the same pressure, even though the member I9 isinclinedasshowninFig. 1.

The member [9 is furnished with a rearwardly extending boss 41 (Fig. 4)having a horizontal bore 48 which receives a slidable anvil carrier 49.This anvil carrier is furnished with an elongate slot 59 which receivesa pin 5| extending transversely through the boss 41, the pin thuspreventing the anvil carrier from rotating about its own axis. The anvilcarrier is hollow and houses a coiled spring 52 one end of which bearsagainst the pin 5|. The spring tends constantly to move the anvilforwardly, that is to say into operative position, its forward movementbeing limited by engagement with the plate 2| The forward part of theanvil carrier is shaped to provide a narrow lower portion 53 (Fig. 3)and the anvil proper 54, the latter being of a transverse sectionsimilar to the shape of the staple to be formed. At opposite sides ofthe part 53 the anvil carrier is provided with forwardly and downwardlysloping surfaces 55 designed to be engaged by cam surfaces 56 at therear portion of the slide 22 so that when the slide moves downwardly toits lowermost position these cam surfaces, by engagement by the inclinedsurfaces 55, force the anvil carrier 49 rearwardly so as to remove theanvil from the formed staple.

At its left-hand side the part I9 is provided with a boss 51 (Fig. 5)which supports the tubular wire guide 58. This wire guide extendsinwardly to the recess 20 and terminates in a beveled end 59 (Fig. 8).The slide 22 is provided at its lefthand side with a beveled surface 69(Fig. 9) which slides in close contact with the surface 59 of the wireguide as the slide 22 moves downwardly, the lower edge of the beveledsurface 69 cooperating with the surface 59- to out OK the wire at anangle so as to provide the staple with a sharp point,

A rigid tubular conduit BI is secured to the outer face of the boss 51and leads to a stationary feed block 62 mounted on the plate l This feedblock is provided with guideways for a sliding feed member 63 (Fig. 1)which carries a pair of depending or pendulous wire-feeding pawls 64urged downwardly into engagement with the wire by springs 65. The block62 has a stationary bracket 68 which supports a third pivoted andspring-pressed pawl 6'! designed to prevent rearward movement of thewire as the feed slide 63 is retracted. The feed slide is provided witha rearwardly directed arm 68 carrying a roll 69 which engages a cam 'Hlon the shaft l8. Preferably a wire-tensioning guide roll H is provided.This roll is mounted on a pivoted arm 12 which is urged in the properdirection by a spring (not shown) thereby to tension the wireand take upslack as the wire passes from the reel to the feed block 52. As the feedslide 53 is reciprocated by the cam '19 the wire W is advanced by thepawls t4 and fed forward through the tubular conduit 6! and the tubularguide 58 until its advancing end contacts the inner surface 2E1 (Fig. 8)of the recess 29. The length of wire thus provided and which extendsacross the recess 20 is sufiicient to form a staple.

Assuming that such a length of wire has been advanced by the feed meansas shown in Figs. 8 and 9 and that the anvil 55 is in its advancedposition and that the slides 22 and 28 are in their upper positions, thecycle of movements is as follows, first the slide 22 is moved down bythe eccentric 21', and as it moves downwardly its beveled lower edgecooperates with the beveled surface 59 of the wire guide 58 to sever thelength of wire which is left resting, by its mid-portion, upon the anvil54. However substantially as the wire is cut, the lower end of the slide22 engages the wire and as the slide continues to descend it forces theright and left-hand end portions of the wire downwardly about the anvil54 so as to form a staple having the central transverse portion W (Fig.12) and the parallel legs W these legs being disposed at opposite sidesof the anvil and being housed in the transverse portions 38 of therecess 3'! of the slide 22. staple has thus been formed, the anvil isretracted by engagement of the cam surface 55 of slide 22 with thesurface 55 of the anvil carrier. The cam 35 now suddenly releases theroll 34 and the driver is projected downwardly by the compressed spring3!. The lower end of the driver engages and imparts a sharp blow to thetransverse portion W of the staple, forcing the latter down along theguide grooves 44 and M and through the marginal material of the upperand intothe insole. The cam 35 immediately begins to retract the driverand at the same time to compress the spring 3|, the slide 22 rises andreleases the anvil. and the spring 52 advances the anvil in readinessfor the formation of another staple.

During the above operation of forming and driving the staple, the uppermaterial U (Fig. 14) of the shoe is engaged between the rolls H3 and H4and is being subjected to an upward stress so as to draw the uppersnugly about the last L. At the same time the operator is pressing theshoe rearwardly against the roll H, and the stationary wiper H3 isforcing the stressed material of the upper inwardly over the edge oftheinsole S. As the upper material is thus laid down against the undersurface of the insole it is engaged by the ends 45 and 35 of the members42 and 43 which hold it in place while the staples are being driven. Theoperation of lasting thus progresses As soon as the about the peripheryof the shoe bottom, the upper being stressed, wiped in and stapledwithout interruption except as the operation may be interrupted by theoperator. If desired the shoe may thus be lasted beginning at any givenpoint and continuing progressively about the entire periphery of theshoe. Alternatively, the lasting operation may be performed at one sideof the shoe and then at the other and substantially at the toe, or thelasting may be performed at the toe first and then at other points, asdesired.

While one desirable embodiment of the invention has herein beenillustrated by way of example it is to be understood that the inventionis not necessarily limited to the specific construction here suggestedbut is to be regarded as broadly inclusive of all equivalentconstructions falling within the terms of the appended claims.

I claim:

1. A lasting machine of the kind wherein a rotary work-advancing rolland a cooperating part, having a work-engaging surface substantiallyparallel to the axis of the roll, grip the upper between them andadvance the work uninterruptedly while updrawing stress is being appliedto the upper, and having a gauge for contact with the outer surface ofthe upper thereby properly to locate the shoe relatively to thework-advancing means, characterized in that the gauge is a disk-likeroll disposed to turn freely about a substantially vertical axis and.having a substantially flat upper surface and a work-engaging edge, anda stationary rigid Wiper blade, Vertically thin and horizontallydisposed, having a free end portion provided with a smoothly roundedwork-engaging edge, said wiper blade being interposed between the planesof the lower end of the work-advancing roll and the upper surface of thegauge roll, the free end portion of the wiper blade being so locatedrelatively to the axis of the work-advancing roll that it overlaps thebottom of a shoe whose upper is Ope atively engaged by thework-advancing roll and contacts the upper closely adjacent to thedelivery side of said roll.

2. A lasting machine of the kind wherein a rotary upper advancing rolland a cooperating part, having a work-engaging surface substantiallyparallel to the axis of said roll, grip the upper between them andadvance the work uninterruptedly while updrawing stress is being appliedto the upper, and having a stationary rigid vertically thin wiper forwiping the margin of the upper downwardly onto the insole, said wiperbeing horizontally disposed and having a free end portion provided witha smoothly round ed work-engaging edge, said stationary wiper having itsoperative portion in a plane directly below the plane of the lower endof the workadvancing roll, the free end portion of the Wiper being solocated, relatively to the axis of the work-advancing roll, that itoverlaps the bottom of a shoe whose upper is operatively engaged by theWork-advancing roll and contacts the upper closely adjacent to thedelivery side of said roll.

3. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled with a sole member on alast, a stationary rigid guide having an elongate slot which makes anangle of approximately 10 with the vertical, a slide movable in saidslot toward and from the sole member, an anvil normally projecting intosaid slot in the path of the slide, means for delivering a length ofWire so as to lay it transversely across the anvil, a cutter elementcarried by the slide, means for actuating the slide to cause the cutterelement to sever the wire, means carried by the slide for forming thesevered length of wire into a staple about the anvil, means carried bythe slide for Withdrawing the anvil from the formed staple, stationaryguid members fixed to said rigid guide and acting to direct the formedstaple into contact with the bottom of the shoe and a driver movablerelae tively to the slide within said rigid guide and stationary guidemembers for advancing the formed staple from said rigid guide throughsaid stationary means and into the shoe.

4. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled With a sole member on alast, a stationary rigid guide having an elongate slot which makes anangle of approximately 10 with the vertical, the lower portion of theslot constituting a staple-forming chamber, an anvil disposed in saidchamber, means for disposing a length of wire across the anvil, a slidemovable in the slot and having at its lower end surfaces cocperable withthe anvil to bend the length of wire and form a staple havingsubstantially parallel legs and to retract the anvil from the formedstaple, stationary rigid guide means mounted upon said stationary rigidguide extending from said staple-forming chamber to the surface of theshoe bottom and providing parallel channels each for the reception ofone leg of the staple, a driver having elements which also fit in therespective guide channels, cam means for raising the driver, and springmeans for imparting a downward driving movement to the driver to advancethe staple from said stationary rigid guide through said rigid guidemeans.

5. In a lastin machine of the class described having means for impartingan updraw to a, shoe upper assembled with a sole member on a last, arigid guide having an elongate slot, a slide movable along the slottoward and from the operative position of the sole member, means forreciprocating the slide, an anvil normally disposed across the slot inthe path of the slide, a tubular wire guide projecting laterally intothe slot and having a vertical beveled end surface, the slide having abeveled surface cooperable with said end surface of the tubular guide tosever a, length of wire protruding from the wire guide into the slot,means for advancing a length of wire through the wire guide and into theslot, the slide having staple-forming means ccoperable with the anvil toform the severed length of wire into a staple, means carried by theslide for retracting the anvil from the formed staple, stationary guidemembers mounted upon said rigid guide, the ends of which guide membersrest against the updrawn upper; a driver for driving the formed. staplethrough said guide members into the work, and means including a springfor imparting a driving blow to the driver.

6. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled with a sole member on alast, a stationary rigid guide the ends of which rest against theupdrawn upper, said guide having an elongate slot, a slide movable insaid slot, the slide having therein an elonagte cruciform slot each ofwhose transverse arms is of a size to receive and closely to confine oneleg of a staple to be driven, means for projecting a length of wiretransversely across the guide slot, cutting means including a cutterelement carried by the slide for severing the length of wire, an anvilnormally disposed in the path of the slide and across which the severedlength of wire extends, means carried by the slide for bending thelength of wire about the anvil to form a staple and for disposing thelegs of the staple in the transverse arms of the cruciform slot, meansfor withdrawing the anvil from the formed staple, stationary guidemembers mounted upon said rigid guide and a driver fitting and slidingon the cruciform slot, and means for imparting a sudden downwardmovement to the driver thereby to drive the staple through saidstationary guide members into the work.

7. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled with a sole member on alast, stationary rigid guide members, staple forming and driving meanscarried by said guid members and including an anvil reciprocabletransversely of said guide members, spring means tending-to hold theanvil in operative position, means for disposing a length of wire acrossthe anvil, a slide reciprocable in said guide members, said slide beingcooperable with the anvil to form the length of wire into a stap e andto retract said anvil after the staple has been formed, stationary meansproviding parallel guide channels for the respective legs of the staple,said guide channels closely confining each respective leg of the stapleand extending to the surface of the shoe bottom, and a driverreciprocable in said guid members for advancing the formed staple alongsaid guide channels.

8. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled with a sole member on alast,

stationary rigid guide members, staple forming and driving means carriedby said guide members and including an anvil reciprocable transverselyof said guide members, a fixed tubular Wire guide, and wire-advancingmeans so constructed and arranged as to project a length of wire fromthe tubular guide across the anvil, the end of the wire guide beingbeveled to form a cutting edge, a reciprocating cutter cooperable withthe beveled end of the tubular wide guide to sever the protruding lengthof wire, a slide reciprocable in said guide members, said slide beingcooperable with the anvil to form the length of wire into a staple andto retract said anvil after the staple has been formed, stationary meansextending to the surface of the shoe bottom and providing guide channelsfor the respective legs of the staple, and a driver slidable in saidguide members for advancing the staple along said guide channels towardthe work.

9. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled with a sole member on alast, stationary rigid guide members, staple forming and driving meanscarried by said guide means and including an anvil, a fixed tubular wireguide, and wire-advancing means so constructed and arranged as toproject a length of wire from the tubular guide across the anvil, theend of the wire guide being beveled to form a cutting edge, meansreciprocable within said guid members, which means cooperate with thebeveled end of the tubular wire guide to sever the protruding length ofwire, and with the anvil to form the length of wire into a staple and toretract said anvil after the staple has been formed, said stationaryrigid guide members having smoothly rounded lower ends for engagementwith the wiped-in marginal material of the shoe upper, said guidemembers having parallel channels in their opposed faces, each channelbeing of such dimensions as to receive and closely to confine one legrespectively of the formed staple, and a driver slidable in said guidemembers for advancing the staple along said guide channels into thework.

10. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled with a sole member on alast, stationary rigid guide members, staple forming and driving meanscarried by said guide members and including an anvil reciprocabletransversely of said guide members, spring means tending to hold theanvil in operative position in said members, means for disposing alength of wire in said members across the anvil, a slide reciprocable insaid guide members, said slide being co-operable with the anvil to formthe length of wire into 2, staple and to retract said anvil after thestaple has been formed, stationary means mounted at the end of saidguide members, said means providing parallel guide channels for therespective legs of the staple, said guide channels closely confiningeach respective leg of the staple and extending to the surface of theshoe bottom, a driver reciprocable in said guide members for advancingthe formed staple along the guide channels of said stationary means intothe sole of the shoe, means for retracting said driver and means forsuddenly advancing the driver into contact with the formed staple.

11. In a lasting machine of the class described having means forimparting an updraw to a shoe upper assembled with a sole member on alast, stationary rigid guide members, staple forming and driving meanscarried by said guide members and including an anvil reciprocabletransversely of said guide members, spring means tending to hold theanvil in operative position in said members, means for disposing alength of wire in said members across the anvil, a slide recipro- 10cable in said guide members, said slide being cooperable with the anvilto form the length of wire into a staple and to retract said anvil afterthe staple has been formed, stationary means mounted at the end of saidguide members, said means providing parallel guide channels for therespective legs of the staple, said guide channels closely confiningeach respective leg of the staple and extending to the surface of theshoe bottom, a driver reciprocable in said guide members for advancingthe formed staple. along the guide channels of said stationary meansinto the sole of the shoe, means for retracting said driver and meansfor suddenly advancing the driver into contact with the formed staple,said last named means including a spring which is compressed by saiddriver retracting means and suddenly released thereby.

JACOB S. KAMBORIAN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 817,660 Nolle Apr, 10, 19061,163,597 Russell Dec. 7, 1915 2,230,375 Clark Feb. 4, 1941 2,251,284Kamborian Aug, 5, 1941 2,251,285 Kamborian Aug. 5, 1941 2,286,362I-Iammann June 16, 1942 1,625,958 Reed Apr. 26, 1927 1,657,133 NewhouseJan. 24, 1928 1,718,199 Baumann June 18, 1929 1,744,715 Allen Jan, 28,1930 2,297,223 Kleinschmit Sept. 29, 1942 FOREIGN PATENTS Number CountryDate 371,949 Germany Mar. 23, 1923

